Automatic water-feed control for boilers



W. C. BLUNDELL AND 0. W. SMITH.

AUTOIIAHC wines FEED conmm. ron BOILERS.

APPUCATIOII FILED OCT. 8. till. 1,318,642. Patented 0m, 14,1919.

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W. C. BLUNBELL AND 0. W. SMITH. AUTOMAUC WATER r250 CONTROL FORBOILERS.

APPLICATION FILED oer. a. new. 1,318,642. Patented Oct. 14,1919. 4 2 wins-aunt 2 wig/15% m: mun-n rumlAl-u' 00;, minim-mu. n u

UNITED STATES PATENT OFFICE.

WILLIAM C. BLUNDELL AND OLIVER W. SMITH, 01 LOS ANGELES, CALIFORNIA.

AUTOMATIO WATER-FEED CONTROL FOR BOILERS.

Specification of Letters Patent.

Patented Oct. 14, 1919.

Application filed October 8, 1918. Serial No. 258,280.

To all whom it may concern:

Be it known that we, WILLIAM G. BLUN-' DELL and ()LIVER W. SMITH, citizens of the United States, residing in the city of Los Angeles, county of Los Angeles, and State of California, have invented certain new and useful Improvements in Automatic Water-Feed Controls for Boilers, of which the following is a specification.

Among the salient objects of our invention are To rovide a mechanism which is controlle by the water condition in the boiler for automatically supplying water to the boiler very slowly, with means for automatically increasing said supply of water to the boiler in case of an emer ency, or if from any cause the water supp in the boiler falls below the mean water evel; to provide in a device of the character referred to an im roved valve mechanism for con trolling t e supply of water to the boiler, or the supply of steam to the ump, as the case may be, said valve mec anism being moved in one direction by the pressure medium, whether it be steam or water, and in the opposite direction by an expansion control member'which operates against the pressure medium; to provide in a device of the character referred to means for draining and blowing out sediment and other matter which may collect in the ipes and connections used, and, in genera to provide a simple, practical, and eificient device of the character referred to which is automatic in its operation.

In order to fully explain our invention,

we have illustrated one practical embodiment thereof on the accompanying sheets of drawings, in which:

Figure 1 .is a side elevation thereof;

Fig. 2 is a top plan view thereof;

Fig. 3 is an end view thereof from the left-hand end of Fig. 1;

Fig. 4 is a sectional view thereof, taken on line H of Fig. 1;

Fig. 5 is an opposite end view ofFig. 1;

Fig. 6 is a diagrammatic view showing a steam boiler and a pump and our improved device interposed therebetween;

Fig. 7 is an enlarged sectional view throughthe valve casing and valve showing the valve open to a maximum extent ig. 8 is a sectional view taken on line 8-8 of Fig. 7

with a si e of the casin and discharges mto said chamber 18. A

Fig. 9 is a sectional view taken on line 99 of Fig. .7

Fig. 10 is a sectional view of a connecting box, connected with the usual water column of a boiler; and

Fig. 11 is an enlarged side elevation, partly in section of a valve mechanism.

Fig. 12 is a fragmentary view showin how the valve mechanism can be connects in the steam su ply pipe from boiler to ump, instead 0 1n the water su ply pipe rom pump to boiler as shown in Fig. 11.

Referring now more in details to the drawings, 1 designates a connecting box, or casing having upper and lower chambers 2 and 3, connected, respeetivel by means of pipes 4 and 5 to the boiler 1;, preferably throu h the usual water column, designated C, in ig. 6. A drain pipe 7 with valve 8 is connected to the lower end of saidcasing 1, and at its upper end said casing isprovided plug 9. Connected to the. upper chamber 2, of said box or casing 1 is a flexible tube 10, which connects at its opposite end with a coupling 11, on the end of a brass expansion pipe 12, the op osite end of which connects with the chamber 3, of said box or casing 1, said pipe 12 being slightly inclined downwardly for drainage purposes. Under normal conditions steam from the upper part of the boiler will find its way through the'pipe 4 into the chamber 2 and into the flexible tube 10, while water from the boiler enters pipe 5, the lower chamber 3 of the casing 1, and the brass pipe 12. Should the water fall below the mean level, or to such an extent that the steam from the pipe 10 shall fill the pipe 12, forcing the water out of the same, sald pipe 12 will be expanded by the heat ofzsaid steam and will move a thrust pin 14 longitudinally for a purpose hereinafter described.

, A valve casing 15 is conneotedto' the box or casin 1, by means ofconnectingrods 16, 16, as s own, said valve casing being also supported on the boiler bykmeans of bracket members 17, 17, shown in ig. 6. Said valve casing 15 isprovided with a partition 15, for dividin the same into two chambers 18 and 19, as c early shown in Fig. 7. A water su ply pipe 20 connects through theiupper 15 and with a pump P,

pipe 21 leadsfrom the chamber 19, of said sion tube connected at one end with the lower chamber of said casing, said flexible tube and expansion tube being connected at their other ends, a valve casing having a partition therein formin two chambers, a cylinder with valve mec anism therein extended through said valve casing and said partition and controlling communication between the chambers in said valve casing, and an operating member extended from the end of said expansion tube through said valve casing and adapted to open said valve mechcopiel 01 this patent may be obtained for anism to establish communication between the chambers of said valve casing, substan tially as described.

Signed at Los Angeles, Los Azn eles county, California, this 16th day of eptember, 1918.

WILLIAM C. BLUN DELL. OLIVER W. SMITH.

In presence of- H. M. BRUNDAGE, LUTHER L. MACK.

five cents each, by addressing the "Commissioner of Patents. Washington, D. 0." 

